Magnetic pump



March 29, 1960 A, TOULMIN, JR 2,930,324

MAGNETIC PUMP 2 Sheets-Sheet 1 Filld Oct. 3. 1955 INVENTOR HARRY A. TOULM/N, Jr

i g ATTORNEYS March 29, 1960' H. A. TOULMIN, JR 2 MAGNETIC PUMP Filed Oct. :5, 1955 2 Sheets-Sheet 2 INVENTOR HARRY A. TOULMl/V, JR.

ATTORNEYS MAGNETIC PUMP Harry A. Toulmin, Jr., Dayton, Ohio, assignor to The Commonwealth Engineering Company of Ohio, Dayton, Ohio, a corporation of Ohio Application October 3, 1955, Serial No. 537,944 3 Claims. (Cl. 103-53) The present invention relates to fluid pumps, more particularly to an electro-magneticallyoperated flexible diaphragm pump.

It is the object of this invention to provide both single and double acting flexible diaphragm pumps wherein electro-magnetic means are employed to actuate the diaphragm. 7 A set of drawings comprising the following figures is utilized in conjunction with a description to disclose the invention:

Figure 1 is a front perspective View of the flexible diaphragm pump disclosed as this invention;

United Smtes P24 Figure 2 is a rear perspective view of the pump disclosed in Figure 1;

Figure 3 is a sectional view taken 3-3 of Figures 1 and 2;

Figure 4 is a front perspective view of a double acting along the lines flexible diaphragm pump which is a modification of the pump illustrated in Figures 1 through 3; p

' Figure 5 is a sectional view taken along the lines 5-5 of Figure 4;

Figure 6 is a perspective view in enlarged scale of the valve arrangement employed in the pump of this invention with a portion of the valve body removed;.

pump. The pump comprises a pump casing 2 which is constructed from casing halves 3 and 4 and connected at the external flanges 5 and 6.

As' seen in Figure 3, a flexible diaphragm 7 is positioned between the halves'of the pump casing. The flexible diaphragm 7 is made from a flexible material having suflicient strength to withstand considerable flexing over a period of time. The diaphragm may be double and an indicator fluid contained between the layers of the dia- 1 phragm. Presence of the indicating fluid in either the 'to a single supply line 36.

A 2,930,324 Fatented Mar. 29 1960 the arcuate slots 13. Slots 13 are closed by the annular shoulder 14 when the valve member 12is resting upon said shoulder.

prises a permanent magnet 17 which surrounds a coil winding 18. 'A core 19 is positioned Within the coil winding 18. An armature 20 is reciprocably received Within the core 19. V

'Ihe armature 20 passes through an opening 21 in a wall of the casing 3, and extends into the pump casing where it is suitably connected at 22 to the flexible diaphragm 7.

The permanent magnet eliminates the need for rectification of the alternating current to separate it into positive and negative pulses..- The coil winding 18 is connected by terminals 23 and 24 to a source of AC. power to enable the armature to oscillate at the frequency of the A.C.-power source.

Proceeding next to Figure 4, there is illustrated therein a modification of the pump disclosed in Figures 1 through 3. The modified pump employs a double acting flexible diaphragm and is constructed in a manner presently to be described. The modified pump comprises a pump casing 25 constructed from casing halves 26 and 27 which are joined at their respective external flanges 28 and 29. A flexible diaphragm 30 is mounted between the casing halves 26 and 27 similar to that of the single acting pump. of Figure 3. In this modified pump each half of the casing forms a pumping chamber, which chambers "are indicated as 31 and 32 respectively.

Eachljof the pump chambers31 and 32"has an inlet 33 which is regulated by a check valve 34 similar in construction to the valve previously described. The inlets to each of the pump chambers are connected by a Similarly each of the pumpchambers 31 and 32 has outlet means 37 which are also regulated by check valves 38. A Y connection 39 connects each of the inlet means 37 to a single discharge line 40.

To actuate the diaphragm 30, solenoids 41A and 41B "are mounted upon each of the casing halves 26 and'27.

The-solenoids are similar in construction and each comprises a coil winding 42, a core 43, a stopt memberj44 in one end of the core, and an armature 45 slidab'ly received within the core. The armatures 45A and 45B extend pumping fluid or the fluid being pumped indicates rupture W of the diaphragm.

The casing half 4rforms with the diaphragm 7 a pumping chamber 8, which has inlet means 9 and outlet means 10 connected thereto. One way or check valves;11' are provided in each of the inlet and outlet means topermit the flow of pumped fluid in a single direction as desired.

Each of the valves 11 is illustrated in greater detail through openings 46 and 47 in the casing halves26 and 27 respectively, and are connected to the diaphragm 30 at 4 8 and 49. Terminals 50 and 51 are provided to con- 4 nect each of the solenoids to a source of electric power. Proceeding to Figure 7, there is illustrateda reversing 1 device employed to reverse the flow of current through each of the solenoids; and to: regulate the frequency of operation 'of the pump illustrated in Figures 4 and 5.

'As shown in Figure 7; the solenoid 41A is connected'to contacts 52 and 53 with contact 52 beingconnected to 'one side of a source of DC. current indicated at 54. -The solenoid 41B 'is "similarly connected to the other source of DC. current indicated at 57. A rotor 58 driven 'by a suitable power source and havin'g'a plurality of contacts 59A to 59F is rotatedin the direction as indicated by the arrow 60 and is employed to periodicall'ylcom- "plete the'circuit between the solenoids and the sourceof V DC. current. In' rotor 58 contacts 59A-F are elec trically connected to each other. I

In operation, rotation of the rotor 58 in the direction indicated by the arrow 60 will bring the contacts C and F into engagement with the contacts 55 and 53 respectively. This will connect the solenoid 41A across'the leads 54 and 57 and will result in energization thereof.

Continued rotation of the rotor 58 will disengage the contacts C and F and will bring the contacts D and A into engagement with the contacts 56 and 52 respectively. This will connect the solenoid 41B across the leads 54 and 57 to similarly result in energization thereof. This alternating energization of solenoids 41A and 4113 will result in movement of their respective armatures and sub sequent actuation of the flexible diaphragm 30 to. the positions indicated at 61 and 62. Movement of the diaphragm 30 to the position 61 will .cause a pumping of the fluid within the pump chamber 31. Return of the diaphragm to the position 62 will similarly pump fluid from the pump chamber 32. During both pumping strokes the fluid will be discharged through the outlets 37 into the discharge line 40.

During the discharge stroke of the diaphragm 30 into each of the pump chambers, the increase in pressure will permit only the outlet check valves to open to enable the pumped fluid to be discharged from the chamber.

Concurrently, the movement of the flexible diaphragm into each chamber will result in the inlet check valve in the other chamber being opened to admit fluid into that pumping chamber.

Although the reversing device illustrated in Figure 7 energizes only one solenoid during each pumping stroke, the arrangement may be modified to energize both solenoids so that each solenoid actuates the diaphragm 30. In this arrangement, however, the solenoids 41A .and 4113 would be reversibly connected across the leads of the magnetic portion toward the electro-magnet.v

Pulsing of the electro-magnet would periodically flex the diaphragm.

In this modification there is no direct connection between the actuating means and the flexible diaphragm.

With the exception of the inlet and outlet valves, the modification possesses no moving parts.

It will be understood that this invention is susceptible to modification in order to adapt it to difi'erent usages l and conditions, and, accordingly, it is desiredto compre- ,hend such modifications Within this invention as may fall within the scope of the appended claims.

What is claimed is: 1. A pump comprising a casing formed from two similar cup-shaped casing halves, a flexible diaphragm between said casing halves when in assembled position with the edge of said diaphragm secured between the registering edges of said casing halves so that the distance the diaphragm moves progressively increases toward the center thereof, said diaphragm beingparallelto theclosed. bottom surfaces of said casing halYes when in its normal non-operating position and being equally .spacedjrom said bottom surfaces in each of said compartments, opposed inlet and outlet means in each of said compartments in the edges thereof so that the fluid being pumped in each compartment will flow across the compartment during the pumping process so as to be acted upon by diaphragm to vibrate said diaphragm and to bring about a pumping action in said compartments.

2. A pump comprising a casing formed from two similar cup-shaped casing halves, a flexible diaphragm between said casing halves when in assembled position with the edge of said diaphragni'secured between the registering edges of said casing halves so that the distance the diaphragm moves progressively increases toward the center thereof, said diaphragm being parallel to the closed bottom surfaces of said casing halves when in its normal non-operating position and being equally spaced from said bottom surfaces in each of said compartments, opposed inlet and outlet means in each of said compartments in the edges thereof so that the fluid being pumped in each compartment will flow across the compartment during the pumping process so as to be acted upon by the entire width of the diaphragm, an electromagnet comprising a solenoid on each of the bottom surfaces of said casing halves opposed from said diaphragm and having an armature actuated thereby and connected to said diaphragm, a plurality of stationary contacts connecting each of said electromagnets across a source of electrical energy, and a rotor having contacts thereon to engage said stationary contacts to alternately connect said electromagnets across said source of electrical energy so as to move said diaphragm in opposite directions sothat each compartment acts as a pumping chamber.

' 3. A pump comprising a casing formed from two similar cup-shaped casing halves, a flexible diaphragm between said casing halves when in assembled position with the edge of said diaphragm secured between the register ing edges of said casing halves so that the distance'the diaphragm moves progessively increases toward the center thereof, said diaphragm being parallel to the closed bottom surfaces of said casing halves when in its nomal non-operating position and being equally spaced from said bottom surfaces in each of said compartments, opposed comprising a solenoid and an armature actuated thereby and connected to said diaphragm, and means for alternately energizing said solenoids so as to cause an alternate pumping action by the diaphragm in each of said compartments.

References Cited in the file of this patent UNITED STATES PATENTS 676,855 Shoemaker June 18, 1901 862,867 Eggleston Aug. 6, 1907 1,404,152 Kettering Ian. 17, 1922 1,653,885 Van Guilder Dec. 27, 1927 1,834,977 Schweisthal Dec. 8, 1931 1,866,137 Tice July 5, 1932 2,223,994 Johnson Dec. 3, 1940 2,253,206 Farrow et al. Aug. 19, 1941 2,416,843 Parsons Mar. 4, 1947 2,578,902 Smith Dec. 18, 1951 2,630,760 Ryba Mar. 10, 1953 2,634,684 Alvarez et al Apr. 14, 1953 FOREIGN PATENTS 553,673 Germany June 29, 1932 612,719 France Oct. 29, 1926 894,337 Germany Oct. 22, 1953 

